diff --git a/ews/ews.go b/ews/ews.go
index 39ed024..88cfe32 100644
--- a/ews/ews.go
+++ b/ews/ews.go
@@ -210,30 +210,32 @@ func (e *EWS) SetUutInfo(cfg cnf.Cfg, logger *log.Logger, host string, addr stri
 		return rst
 	}
 
-	//如果部分客户端参数为空, 则保留uutinfo表中已存在记录的值
+	//如果测试项不为空(第一个心跳包), 当部分客户端参数为空, 则保留uutinfo表中已存在记录的值
 	mac := params["MAC"]
-	if mac == "" {
-		mac = ui.MAC
-	}
 	pn := params["PARTNO"]
-	if pn == "" {
-		pn = ui.PartNO
-	}
 	mo := params["MO"]
-	if mo == "" {
-		mo = ui.MfgMO
-	}
 	sku := params["SKU"]
-	if sku == "" {
-		sku = ui.MfgSKU
-	}
 	line := params["LINE"]
-	if line == "" {
-		line = ui.MfgLine
-	}
 	stage := params["STAGE"]
-	if stage == "" {
-		stage = ui.MfgStage
+	if params["ITEM"] != "" {
+		if mac == "" {
+			mac = ui.MAC
+		}
+		if pn == "" {
+			pn = ui.PartNO
+		}
+		if mo == "" {
+			mo = ui.MfgMO
+		}
+		if sku == "" {
+			sku = ui.MfgSKU
+		}
+		if line == "" {
+			line = ui.MfgLine
+		}
+		if stage == "" {
+			stage = ui.MfgStage
+		}
 	}
 
 	//如果此USN的记录存在于uutinfo表中, 且此USN的Relay/MAC/Item/Status/Message已变化, 则: